This B&M Tork Master 2000 fits 1966-91 Ford C6 transmissions with a 1.375-inch crank pilot and has a 11.4-inch bolt circle. Don't let the exceptional value fool you into thinking Tork Master Converters are not packed with lots of quality features, making them the best value-priced street performance converters money can buy. These converters perform best when paired with stock to modified engines up to 350hp/350 ft lbs of torque, and lighter weight applications, like street rods. The Tork Master will provide noticeably quicker launches and harder acceleration while maintaining normal daily driving qualities. Upgrades like a new precision alloy steel pump drive tube, needle thrust bearing when factory equipped, new thrust washer between turbine and cover when required, and pressure tested and fully balanced by expertly trained technicians. Notes: Higher stall converters can generate more heat, so we highly recommend adding a transmission cooler. Not recommended for big block, supercharged, plate-type nitrous oxide or trans-brake applications. The product images shown are for illustration purposes only and may not be an exact representation of the product. NOTE: 9 1/2-inch converters are not compatible with big-block Ford applications. Due to clearance limitations, the converter cover will contact the flexplate bolts before the mounting pads can fully seat against the flexplate. Do not attempt to tighten the mounting lugs to force the converter into position, as this can pull the lugs out of the converter and cause permanent damage. These converters are suitable for Ford applications up to the 400 Modified (400M).